Kayak requires a minimum cash balance of $40,000 at each month-end. Loans taken to meet this requirement charge 1%, interest per month, paid at each month-end. The interest is computed based on the beginning balance of the loan for the month. Any preliminary cash balance above $40,000 is used to repay loans at month-end. The company has a cash balance of $40,000 and a loan balance of $80,000 at January 1.